It explains how seismographs detect seismic waves and calculate the earthquake's distance and magnitude, which was estimated at 7.1.

The U.S. Geologic Survey (USGS) insists that earthquake forecasting is not possible. Thus, the agency only calculates the ...

Large quakes produce shaking at a variety of frequencies. Some waves can travel hundreds of miles, and are amplified by local geological conditions.

The magnitude 7.7 earthquake was powerful, shallow and in a heavily populated region with vulnerable buildings.

The U.S. Geological Survey says a tsunami warning has been canceled for Papua New Guinea after a strong magnitude 6.9 earthquake ...

Seismic readings of the interior of Mars strongly suggest large quantities of water buried 6 to 12 miles underground. Persuasive new evidence supporting the possibility of liquid water deep ...

Preliminary reports from the U.S. Tsunami Warning System said tsunami waves were possible for coastlines within about 190 miles of the earthquake’s epicenter, including those on Tonga. The system ...